Philippine Nuclear Research Institute

n

Potential Applications of Radionuclide Monitoring Derived-Data for Scientific Research

1 Health Physics Research Section, Atomic Research Division2Management Information System, Technology Diffusion Division3Isotope Technique Application Section, Nuclear Services Division

Philippine Nuclear Research Institute, Commonwealth Ave., Diliman, Quezon City 1101, Philippines

1Fe M. Dela Cruz , 1Teofilo Y. Garcia, 2Ana Elena L. Conjares, and 3Adelina DM. Bulos

This poster will present two ways of possible utilization of air particulates data for conducting scientificstudies. One such study is the assessment of the contribution of natural radionuclides in the airparticulates to the effective dose estimate of Filipinos. In this study, the concentration of naturalradionuclide from the Uranium and Thorium series and Potassium-40 will be sourced from the RN52data and will be processed and integrated in the calculations for dose assessment purposes. The otherprospective use would be on the measurement of the atmospheric flux of natural radionuclides such asBe-7 and Pb-210 for the establishment of the inventory of these radionuclides which can be use astracers of soil movement. The concentration of Be-7 and Pb-210 will be analyzed and a comparativeanalysis in conjunction with the concentration of these radionuclides in the soil will be made.

One of the CTBTO verification systems is the operationof radionuclide monitoring station for air particulates .The Philippines through the Philippine Nuclear ResearchInstitute operates and maintains such type of verificationregimes, RN-52 Station. The station is co-located at theWeather and Radar Station of the PhilippineAtmospheric, Geophysical and Astronomical ServicesAdministration (PAGASA) in Tanay, Rizal, Philippines.RN-52 is a manual station, whose primary function is toprovide continuous monitoring of the levels ofradioactivity in the air. This involves collection ofparticulate materials on a filter; performance of gammaspectroscopy to identify radionuclides in the air filtersamples and transmittal of raw spectral data using theGlobal Communications Infrastructure (GCI) to theInternational Data Centre (IDC) for processing andanalysis. The designated operator manually operates thestation daily to change the filter and complete the dailyroutine. Other tasks such as data collection, dataformatting and transmission are performed automatically.

CTBTO-NDC

ABSTRACTNUCLIDE HALF LIFE MDC(uBq/m3)BA-140 12.752 D 3.34CE-143 1.37662 D 4.72CS-134 2.062 Y 0.83CS-136 13.16 D 0.93CS-137 30.1 Y 0.84I-131 8.04 D 1.11I-133 20.8 H 4.08

MO-99 2.7475 D 9.95NB-95 34.97 D 0.98

RU-103 39.26 D 0.81TE-132 3.204 D 1.19ZR-95 64.02 D 1.39ZR-97 16.9 H 5.46

NDC Products

0.0E+00

1.0E+03

2.0E+03

3.0E+03

4.0E+03

5.0E+03

6.0E+03

7.0E+03

8.0E+0312

-Jan

-10

16-J

an-1

020

-Jan

-10

24-J

an-1

020

-Jan

-10

24-J

an-1

028

-Jan

-10

1-Fe

b-10

5-Fe

b-10

9-Fe

b-10

13-F

eb-1

017

-Feb

-10

21-F

eb-1

026

-Feb

-10

3-M

ar-1

09-

Mar

-10

13-M

ar-1

017

-Mar

-10

21-M

ar-1

026

-Mar

-10

30-M

ar-1

03-

Apr-

107-

Apr-

1011

-Apr

-10

15-A

pr-1

019

-Apr

-10

23-A

pr-1

028

-Apr

-10

3-Ju

n-10

7-Ju

n-10

11-J

un-1

015

-Jun

-10

19-J

un-1

023

-Jun

-10

28-J

un-1

02-

Jul-1

06-

Jul-1

011

-Jul

-10

18-J

ul-1

022

-Jul

-10

26-J

ul-1

031

-Jul

-10

4-Au

g-10

8-Au

g-10

12-A

ug-1

017

-Aug

-10

21-A

ug-1

027

-Aug

-10

31-A

ug-1

04-

Sep-

108-

Sep-

1012

-Sep

-10

16-S

ep-1

019

-Sep

-10

23-S

ep-1

027

-Sep

-10

1-O

ct-1

05-

Oct

-10

9-O

ct-1

013

-Oct

-10

17-O

ct-1

021

-Oct

-10

25-O

ct-1

029

-Oct

-10

11/0

2/10

11/0

6/10

11/1

1/10

11/1

5/10

11/1

9/10

11/2

3/10

11/2

7/10

12/0

3/10

12/0

7/10

12/1

1/10

12/1

5/10

12/1

9/10

12/2

3/10

12/2

7/10

12/3

1/10

4-Ja

n-11

8-Ja

n-11

12-J

an-1

116

-Jan

-11

20-J

an-1

124

-Jan

-11

28-J

an-1

11-

Feb-

115-

Feb-

119-

Feb-

1113

-Feb

-11

17-F

eb-1

121

-Feb

-11

25-F

eb-1

1

Series1

APPLICATIONS

Minimum Detectable Concentration for Key Nuclides

Peak Search Results43 peaks found in spectrum by automated peak search.37 peaks associated with nuclides by automated processing.6 peaks not associated with nuclides by automated processing.86 percent of peaks were associated with nuclides.

0

100

200

300

400

500

600

700

800

900

1000

12-Jan-10 18-Jan-10 1-Feb-10 15-Feb-10 3-Mar-10 19-Mar-10 3-Apr-10 17-Apr-10 3-Jun-10 17-Jun-10 2-Jul-10 20-Jul-10 4-Aug-10 19-Aug-10 4-Sep-10 18-Sep-10 1-Oct-10 15-Oct-10 29-Oct-10 13-Nov-10 27-Nov-10 13-Dec-10 27-Dec-10 10-Jan-11 24-Jan-11 7-Feb-11 21-Feb-11

Series1

Station Laboratory

Ethernet Hub

Digital Spectrum Analyzer

Multi-port Terminal Server

Manual Hydraulic

Filter Press

HPGeDetector

Climate Control

UPS

Decay Cabinet

Open/closed Sensor

Barcode Reader

Data Logger

Barcode Label Printer

Cooling System

Open/closed Sensor

Barcode Reader

GPS Clock

Warm-up/HV shutdown

Link to IDC

Open/closed Sensor

Barcode Reader

Meteorological Data

Data Logger Device Server

Ethernet

Serial

Analog

Air Sampler Data

CTBTO. Science and Technology 2011 Conference. Vienna, Austria. 8 - 10 June 2011

Breathing Rate 1.5m /hDOSE RATE = Activity Concentration (Bq/m3) x Breathing Rate (1.5 m3/h)

x IBSS conversion (Sv/Bq) x Exposure hours x 1000mSv/Sv

= expressed in mSv/hIBSS = International Basic Safety Standards for Protection against Ionizing Radiation

Protection and for the Safety of Radiation Sources (public)

I. DOSE ASSESSMENT

II. ATMOSPHERIC FLUX DETERMINATION

Protection and for the Safety of Radiation Sources (public)ESTIMATION OF EFFECTIVE DOSE PER RADIONUCLIDEANALYZED IN AIR PARTICULATEESTIMATION OF EFFECTIVE DOSE PER RADIONUCLIDEANALYZED IN AIR PARTICULATE

U-238 Series

Th-32 Series

Fission Products (RN Data collected during the recent Fukushima Event )Natural Radionuclides

Pb-210

Be-7